Improvement in hubs for carriage-wheels



UNITED STATES PATENT QEEICE.

PATRICK MURPHY, OF SOUTH AMESBURY, MASSACHUSETTS.'

IMPROVEMENT IN HUBS FOR CARRIAGE-WHEELS.

Specification forming part of Letters Patent No. 141,659, dated August12, 1873; application liled March 18, 1872.

To all whom t may concern:

Be it known that I, PATRICK MURPHY, of South Amesbury, in the county ofEssex and State of Massachusetts, have invented a new and usefulImprovement in Wheel-Hubs and I do hereby declare that the following isa full and exact description of the same, reference being` had to theaccompanying drawings and to the letters of reference marked thereon.

This invention has for its object the production of an improvedwheelJhnb, which, by reason of its specific construction, shall possesscertain marked advantages, as will be fully described hereinafter.

In the drawings, Figure l represents a side elevation of my improvedhub; Fig. 2, alongitudinal sectional elevation 5 and Fig. 3, anendelevation.

To enable others to make my improved hub, I will now proceed to describeminutely its construction.

A A represent cast-metal shells peculiarly constructed, as follows: crepresents the horizontal or band portion, which tapers slightly fromits outer edge to the point x. c represents the upright or ring portion,which is inwardly inclined from the point :v to its termination, asshown. B represents the wood part of the hub, which is cut, by anysuitable means, in such manner that its end portions correspond in formwith the shape of the shells, as clearly indicated in Fig. 2. The shellsare pressed into position upon the wood portion, and are securely heldby riveted rods located at suitable intervals, as indicated in Figs. 2and 3.

The advantages of this construction are as follows: The inclinedportions a of the shells, being drawn together and securely held byrivets, have a tendency to hold the wood and prevent it from being splitwhen cut for the reception of spokes. The upper edges of the shells givestrength to the wood near the cuttin g-line, while the general shapepermits the use of a large central body of such form as is well adaptedto resist the strain incidental to the cutting'. The band portions ofthe shells inclose the horizontal portions of the wood, and prevent thesame from checking.

By means of this peculiar construction I am enabled to produce hubs asan article of man ufacture which will not split while being cut forspokes, and which will not check by exposure.

It is designed in practice to manufacture the hubs in the mannerdescribed, and sell them to the trades, the process of cutting them forthe spokes and boring them for the boxes being afterward performed whenthe hubs are needed for use.

Having thus fully described my invention,

what I claim, and desire to secure by Letters Patent,is-

The combination of the shells A A', having projections c c', with thewood B, constructed as set forth.

This speciication signed and witnessed this 2d day of March, 1872.

PATRICK MURPHY. Witnesses:

J. L. NEWTON, J. D. TOWLE.

